我正在使用片段类创建横向布局。但现在我的代码在listMovieActivity文件中显示错误。我尝试从stackoverflow中获得一些答案，但这对我没有帮助。
这是我的listMovieActivity代码：
package com.example.moviemanager;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
public class listMovieActivity extends FragmentActivity {
private MovieDetailFragment detailFragment = null;
private MovieListFragment listFragment = null;
private FragmentManager manager;
private int selectedItemIndex = -1;
private String title=null;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listmovie);
manager = getSupportFragmentManager();
detailFragment = (MovieDetailFragment) manager.findFragmentById(R.id.detailmovie_fragment);
listFragment = (MovieListFragment) manager.findFragmentById(R.id.listmovie_fragment);
}
public boolean onCreateOptionsMenu(android.view.Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
//getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
protected void onResume() {
super.onResume();
int orientation = getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_LANDSCAPE)
showDetails(selectedItemIndex,title);
}
public void showDetails(int selectedItem, String ttl) {
//Log.d("FRAGMENT", "Selected item " + selectedItem);
selectedItemIndex = selectedItem;
title = ttl;
int orientation = getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
if (detailFragment != null) {
// update entry
detailFragment.updateDetails(selectedItem,ttl);
}
} else {
// show DetailsActivity
Intent intent = new Intent(this, DetailMovie.class);
intent.putExtra("POSITION", selectedItem);
intent.putExtra("TITLE", ttl);
startActivity(intent);
}
}
}
这是我的DatabaseHandler代码：
public class DatabaseHandler {
String cmd;
private static final String DBTAG = "DatabaseHandler";
public static final String KEY_ROWID = "_id";
public static final int COL_ROWID = 0;
public static final String KEY_KEY = "key";
public static final String KEY_TITLE = "title";
public static final String KEY_TYPE = "type";
public static final String KEY_STORY = "story";
public static final String KEY_RATING = "rating";
public static final String KEY_LANGUAGE = "language";
public static final String KEY_RUNTIME = "runtime";
public static final int COL_KEY = 1;
public static final int COL_TITLE = 2;
public static final int COL_TYPE = 3;
public static final int COL_STORY = 4;
public static final int COL_RATING = 5;
public static final int COL_LANGUAGE = 6;
public static final int COL_RUNTIME = 7;
public static final String[] ALL_KEYS = new String[] {
KEY_ROWID, KEY_KEY, KEY_TITLE, KEY_TYPE, KEY_STORY,
KEY_RATING, KEY_LANGUAGE, KEY_RUNTIME};
public static final String DATABASE_NAME = "movieDb";
public static final String DATABASE_TABLE = "movieTable";
public static final int DATABASE_VERSION = 1;
private static final String DATABASE_CREATE_SQL =
"create table " + DATABASE_TABLE
+ " (" + KEY_ROWID + " integer primary key autoincrement,"
+ KEY_KEY + " text not null,"
+ KEY_TITLE + " text not null,"
+ KEY_TYPE + " text not null,"
+ KEY_STORY + " text not null,"
+ KEY_RATING + " text not null,"
+ KEY_LANGUAGE + " text not null,"
+ KEY_RUNTIME + " integer not null"
+ ");";
private final Context context;
private DatabaseHelper dbHelper;
private SQLiteDatabase db;
public DatabaseHandler(Context ctx){
this.context = ctx;
dbHelper = new DatabaseHelper(context);
}
public DatabaseHandler open(){
db = dbHelper.getWritableDatabase();
return this;
}
public void close(){
dbHelper.close();
}
public void insertRow(String mvkey, String mvtitle, String mvtype,
String mvstory, String mvrating, String mvlanguage, int mvruntime){
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_KEY, mvkey);
initialValues.put(KEY_TITLE, mvtitle);
initialValues.put(KEY_TYPE, mvtype);
initialValues.put(KEY_STORY, mvstory);
initialValues.put(KEY_RATING, mvrating);
initialValues.put(KEY_LANGUAGE, mvlanguage);
initialValues.put(KEY_RUNTIME, mvruntime);
open();
db.insert(DATABASE_TABLE, null, initialValues);
close();
}
public void deleteRow(long rowId){
open();
cmd = new String ("DELETE FROM " + DATABASE_TABLE + " WHERE ( "+KEY_ROWID+" =" + rowId + " );");
db.execSQL(cmd);
close();
// String where = KEY_ROWID + "=" + rowId;
// return db.delete(DATABASE_TABLE, where, null) != 0;
}
public void deleteAll(){
Cursor c = getAllRows();
long rowId = c.getColumnIndexOrThrow(KEY_ROWID);
if(c.moveToFirst()){
do{
deleteRow(c.getLong((int)rowId));
}while(c.moveToNext());
}
c.close();
}
public Cursor getAllRows(){
String where = null;
Cursor c = db.query(true, DATABASE_TABLE, ALL_KEYS, where, null, null, null, null, null);
if(c!= null){
c.moveToFirst();
}
return c;
}
public Cursor getRow(long rowId){
String where = KEY_ROWID + "=" + rowId;
Cursor c = db.query(true, DATABASE_TABLE, ALL_KEYS, where, null, null, null, null, null);
if(c!= null){
c.moveToFirst();
}
return c;
}
public boolean updateRow(long rowId, String mvkey, String mvtitle,
String mvtype, String mvstory, String mvrating,
String mvlanguage, int mvruntime){
String where = KEY_ROWID + "=" + rowId;
ContentValues newValues = new ContentValues();
newValues.put(KEY_KEY, mvkey);
newValues.put(KEY_TITLE, mvtitle);
newValues.put(KEY_TYPE, mvtype);
newValues.put(KEY_STORY, mvstory);
newValues.put(KEY_RATING, mvrating);
newValues.put(KEY_LANGUAGE, mvlanguage);
newValues.put(KEY_RUNTIME, mvruntime);
return db.update(DATABASE_TABLE, newValues, where, null) != 0;
}
public Cursor listMovieTitle(){
return db.rawQuery("SELECT "+ KEY_TITLE + " FROM " + DATABASE_TABLE,null);
}
public Cursor get_id(String ttl){
return db.rawQuery("SELECT "+ KEY_ROWID + " FROM " + DATABASE_TABLE + " WHERE (" + KEY_TITLE + " = " + ttl + " );",null);
}
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context){
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase _db) {
_db.execSQL(DATABASE_CREATE_SQL);
}
@Override
public void onUpgrade(SQLiteDatabase _db, int oldVersion, int newVersion) {
Log.w(DBTAG, "Upgrading application's database from version " + oldVersion
+ " to " + newVersion + ", which will destroy all old data!");
// Destroy old database:
_db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
// Recreate new database:
onCreate(_db);
}
}
}
这是我每次点击我的显示按钮时收到的错误堆栈跟踪：
04-04 01:00:15.314 811-811/com.example.moviemanager E/Trace﹕ error opening trace file: No such file or directory (2)
04-04 01:01:15.098 859-859/com.example.moviemanager E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.moviemanager/com.example.moviemanager.listMovieActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
at android.app.Activity.setContentView(Activity.java:1881)
at com.example.moviemanager.listMovieActivity.onCreate(listMovieActivity.java:20)
at android.app.Activity.performCreate(Activity.java:5104)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
at com.example.moviemanager.DatabaseHandler.open(DatabaseHandler.java:65)
at com.example.moviemanager.MovieListFragment.onCreateView(MovieListFragment.java:29)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:900)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1082)
at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1184)
at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:285)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
at android.app.Activity.setContentView(Activity.java:1881)
at com.example.moviemanager.listMovieActivity.onCreate(listMovieActivity.java:20)
at android.app.Activity.performCreate(Activity.java:5104)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5041)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
at dalvik.system.NativeStart.main(Native Method)
04-04 01:01:19.447 879-879/com.example.moviemanager E/Trace﹕ error opening trace file: No such file or directory (2)
以前，我有同样的问题错误膨胀类片段，但后来我通过将我的android listview id更改为android custome list id解决了它。但现在问题再次出现，但这次最糟糕的是我的数据处理程序也显示出错误。可以帮助我吗。
答案 0 :(得分：0)
在DatabaseHandler中：
private final Context context;
这没有任何意义，无法分配最终字段。您如何通过支票？
请提供MovieListFragment代码。